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Date:- 14 April, 2011
Data Sheet Issue:- A1
Provisional Data
IGBT Gate Driver
Type C0044BG400
Special Features
• High reliability topology
• Separate gate interface card for optimal packaging
• Designed for ultra low power consumption
• Balanced supply current in ON and OFF mode
• Build in DC/DC-converter with soft start
• Integrated input filter for low EMI
• Separate low impedance path for parasitic EMI currents
• PD-Voltage levels available up to 7kV
• Low impedance from gate to emitter at start-up and power fail
• Monitoring of all secondary supply voltages
• Monitoring of IGBT switching status (VCE-desat detection)
• Soft switch-OFF at VCE-desat fault condition
• Fibre-optic links for switching commands and status control
• Low light protection for input signal
• Short-pulse suppression, configurable
• Balanced propagation delay time
• Gate Current up to 44A
• Optional gate-speed-up capacitors
Absolute Maximum Ratings
Vs
Iout peak
Iin peak
Iav
Vpd
dv/dt
Rg on
Rg off
Top
Tstg
Ratings
Supply voltage primary
Gate- ON current (theoretical)
Gate- OFF current (theoretical)
Average gate current
Partial discharge voltage
Slew rate4
minimal Ron
minimal Roff
Operating temperature
Storage temperature
Maximum limits
18
44
-68
>100 (tbd.)
min. 2.5 (up to 7 on request)
tbd., >50
0.75
0.75
-20 to +55
-20 to +55
Units
V
A
A
mA
kV
kV/µs
°C
°C
Provisional Data Sheet Type C0044BG400 Issue A1
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April, 2011

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Characteristics
Vs
Is0
Vgon
Vgoff
Vce desat
PWG +15
PWB +15
PWG +5
PWB +5
PWG -15
PWB -15
PWG +50
PWB +50
Td
Ts
Rs
Cc
Burst susceptibility
Parameter
Supply voltage primary
Supply current without load
Gate-On voltage
Gate-Off voltage
Collector-Emitter-threshold voltage
Power Good Monitor +15V supply secondary
Power Bad Signal +15V supply secondary
Power Good Monitor +5V supply secondary
Power Bad Signal +5V supply secondary
Power Good Monitor -15V supply secondary
Power Bad Signal -15V supply secondary
Power Good Monitor +50V supply secondary
Power Bad Signal +50V supply secondary
propagation-delay time (Ton=Toff)
Soft-switch-off time
Passive short circuit gate resistor
Coupling capacitance primary-secondary
Conducted noise immunity (burst)
IGBT Gate Driver Type C0044BG400
min.
14.4
+11.5
-15.8
20
typ.
15
70
+15
-15
25
14.2
12.0
4.8
4.5
-13.7
-12.6
+44.5
+36.5
1.4
30
20
16
>4
max.
15.6
+15.8
-11.5
20
Units
V
mA
V
V
V
V
V
V
V
V
V
V
V
µs
µs
K
pF
kV
Provisional Data Sheet Type C0044BG400 Issue A1
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IGBT Gate Driver Type C0044BG400
Functional Description
Start up behavior
An un-powered gate driver applies impedance to the gate–emitter connection as follows:
- Permanent 20kpassive resistance (plus possible 20kparallel on “IGBT Interface Board”)
- Low impedance by discharged supply capacitors and main amplifier freewheeling diodes.
- Separate MOSFET that clamps gate output to minus supply voltage as soon as the difference from positive
supply to negative supply exceeds 3V during power up sequence until “Power Good” is valid.
This way the gate–emitter output is kept in OFF status during power up and power down sequence of the primary side
driver supply. (See Figure 1)
Figure 1: Typical start up sequence
Ch1: Gate voltage at power up condition
Fig 2: Internal PWM signal generation at the output of
special circuit. Optical transmitter driven with sinusoidal
current
Ch1: Weak PWM signal direct at optical receiver (RX) output
Ch2: Recovered PWM ON command (driver internal)
Short Pulse Suppression – Low Light Protection
The optical Receiver (RX) type “versatile Link family ” HFBR-2521 (5M-Baud) is followed by a special circuit that not
only ignores short ON or OFF commands, but also filters low light condition in order not to destroy driver or IGBT
(within a t.b.d. range of the signal weakness). Propagation delay time for ON and OFF command is adjusted
separately and well balanced to typical 1.4µsec at good optical signal quality. Depending on low light condition this
delay may increase but will end up in one defined PWM command.
(See Figure .2)
Please note that all optical PWM commands will be symmetrically delayed by this circuit, expressed in the driver
propagation delay time.
Vce-desat Detection
The switching status of the IGBT is monitored by a current source. The VCE-desat trip level is adjustable over a wide
range and adjusted to 25VCE, typically. Propagation delay OFF time is typically 0,3-0,5 µsec (depending on dv/dt of
IGBT switching). The current source is designed to typ. 9 mA, trip level is set to < 6 mA. (Figures 3 and 4). A wide
range of other levels/currents are available on request.
Figure 3: Switch ON command
Ch1: Gate voltage at 300nF simulated gate
Ch2: Collector- emitter voltage
Ch3: Internal VCE0 signal: Detection of IGBT ON status
Figure 4: Switch OFF command
Ch1: Gate voltage at 300nF simulated gate
Ch2: Collector- emitter voltage
Ch3: Internal VCE0 signal: Detection of IGBT OFF status
Provisional Data Sheet Type C0044BG400 Issue A1
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IGBT Gate Driver Type C0044BG400
Optical Feedback Signal, Error Management and Soft Turn OFF Timing
The optical feedback signal is a mix of a “real IGBT ON-echo” signal, power good condition and IGBT short circuit
detection. It uses a transmitter (TX) type “versatile Link family” HFBR-1521 (5M-Baud).
With all secondary side supply voltages in “power good” status and no “ON command” at RX present, the feedback
signal is illuminated with typical 35 mA.
If an ON command at RX occurs for longer than the short pulse suppression time the IGBT gate will be switched to
ON status (after driver propagation delay ON time). As soon as the IGBT reacts correctly and it’s VCE meets the trip
level of 25V, the feedback signal will switch off TX light and act as a “real IGBT echo” (within propagation delay of the
internal VCE0 signal).
If a PWM OFF command (longer than short pulse suppression OFF time) occurs at a VCE < 25 V condition the IGBT
gate is switched off with both (normal and soft turn OFF) amplifier paths regulated to -15 V. This is considered a
normal/ fast turn OFF operation.
If VCE never reaches the trip level or VCE increases during an ON command above the trip level, the feedback signal
reports a VCE-desat error by switching ON the TX light while a PWM ON command is present at RX.
Please note that this is a way for the user to detect a VCE-desat error monitored by the driver.
In this version of the driver family the driver does NOT turn OFF automatically. The PWM OFF command has
to be generated by the user and the user has to take care of adequate guidelines to reach a tolerable OFF time
delay. (Typical waiting time several µsec, depending on IGBT type).
Any OFF user command at VCE > 25V will be executed by the soft turn OFF path only.
After a soft turn OFF time of typically 30 µsec the IGBT should have switched successfully into a safe OFF status.
After this soft turn OFF time the normal/ fast turn OFF path is enabled again, to provide low impedance OFF status at
the gate like in nominal current turn OFF condition.
RX signal (PWM)
Power Good
VCE > 25V
TX signal (feedback)
00 I I 00 I I
0000 I I I I
0I0I0I0I
0000 I I 0 I
Table 1: Logic State of Feedback TX/ RX Signal (I = light ON)
Turn OFF Timing with and without Vce Trip
Figure 5: Switch OFF at normal operation (no VCE-desat
trip)
Figure 6: Switch OFF at VCE-desat trip
Ch1: Internal „Soft-OFF“enable command
Ch2: Collector-emitter voltage
Ch3: Internal „Fast-OFF“ command
(= low impedance OFF) state
Ch4: RX PWM light command
Please note: Soft turn OFF time was set to 81 µsec here!
Under Voltage Error Management
This driver monitors all supply voltages generated on the secondary side with defined power good levels and a large
hysteresis. Power good condition is given when desired voltage levels are nearly reached for the first time. Once
power good is generated, it accepts a fairly low supply condition until the power good signal fails. Once power fail is
detected the gate output is forced into IGBT OFF state and feedback signal TX will turn OFF normal/ fast.
Provisional Data Sheet Type C0044BG400 Issue A1
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April, 2011

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Block Diagram
IGBT Gate Driver Type C0044BG400
Customisation Code
Table 2 lists the customisation codes of gate drivers of different Westcode IGBT parts.
IGBT Type
Customisation code
of gate driver
T0160NB45A
C0044BG400SBK
T0240NB45E
C0044BG400SBL
T0340VB45G
C0044BG400SBQ
T0360NB25A
C0044BG400SBA
T0500NB25E
C0044BG400SBB
T0510VB45E
C0044BG400SBE
T0570VB25G
C0044BG400SBF
T0600TB45A
C0044BG400SBM
T0800EB45G
C0044BG400SBG
T0800TB45E
C0044BG400SBN
T0850VB25E
C0044BG400SBH
T0900EB45A
C0044BG400SBP
T1200EB45E
C0044BG400SBR
T1200TB25A
C0044BG400SBC
T1500TB25E
C0044BG400SBD
T1600GB45G
C0044BG400SBJ
T1800GB45A
C0044BG400SBS
T2250AB25E
C0044BG400SBV
T2400GB45E
C0044BG400SBT
Table 2: Customisation code of gate driver
Provisional Data Sheet Type C0044BG400 Issue A1
Page 5 of 6
April, 2011